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annotate OrthancFramework/Sources/MultiThreading/Semaphore.cpp @ 5640:f7adfb22e20e

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updated copyright, as Orthanc Team now replaces Osimis
author Sebastien Jodogne <s.jodogne@gmail.com>
date Thu, 30 May 2024 21:19:57 +0200
parents 48b8dae6dc77
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1 /**
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2 * Orthanc - A Lightweight, RESTful DICOM Store
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3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
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4 * Department, University Hospital of Liege, Belgium
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5 * Copyright (C) 2017-2023 Osimis S.A., Belgium
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6 * Copyright (C) 2024-2024 Orthanc Team SRL, Belgium
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7 * Copyright (C) 2021-2024 Sebastien Jodogne, ICTEAM UCLouvain, Belgium
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8 *
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9 * This program is free software: you can redistribute it and/or
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10 * modify it under the terms of the GNU Lesser General Public License
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11 * as published by the Free Software Foundation, either version 3 of
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12 * the License, or (at your option) any later version.
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13 *
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14 * This program is distributed in the hope that it will be useful, but
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15 * WITHOUT ANY WARRANTY; without even the implied warranty of
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16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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17 * Lesser General Public License for more details.
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18 *
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19 * You should have received a copy of the GNU Lesser General Public
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20 * License along with this program. If not, see
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21 * <http://www.gnu.org/licenses/>.
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22 **/
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25 #include "../PrecompiledHeaders.h"
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26 #include "Semaphore.h"
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27
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28 #include "../OrthancException.h"
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30
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31 namespace Orthanc
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32 {
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33 Semaphore::Semaphore(unsigned int availableResources) :
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34 availableResources_(availableResources)
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35 {
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36 }
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37
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38 unsigned int Semaphore::GetAvailableResourcesCount() const
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39 {
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40 return availableResources_;
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41 }
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42
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43 void Semaphore::Release(unsigned int resourceCount)
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44 {
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45 boost::mutex::scoped_lock lock(mutex_);
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46
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47 availableResources_ += resourceCount;
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48 condition_.notify_one();
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49 }
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50
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51 void Semaphore::Acquire(unsigned int resourceCount)
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52 {
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53 boost::mutex::scoped_lock lock(mutex_);
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54
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55 while (availableResources_ < resourceCount)
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56 {
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57 condition_.wait(lock);
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58 }
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59
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60 availableResources_ -= resourceCount;
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61 }
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62
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63 bool Semaphore::TryAcquire(unsigned int resourceCount)
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64 {
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65 boost::mutex::scoped_lock lock(mutex_);
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66
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67 if (availableResources_ < resourceCount)
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68 {
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69 return false;
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70 }
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71
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72 availableResources_ -= resourceCount;
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73 return true;
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74 }
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75 }